Basic principle of WAPL

An access point of the WAPL (hereafter we call this as "WAP") has two wireless LAN interfaces.One side is used for communication between WAPs, and the other side for communication with terminals under WAP. Ad-hoc-mode is applied to communication between WAPs, and a routing table is automatically generated. Infrastructure-mode is applied to communication between a WAP and terminals. Communication packets between terminals are capsulated by a nearby WAP and decapsulated by the WAP of the addressed terminal (Fig.3). WAP always recognizes terminals under itself and relay packets from the terminals. WAP controls terminals under itself only and automatically searches destination WAP address at the beginning of communication. Because of this method, communication load will not become large even if the size of the system is big or system structure changes frequently. Terminals do not need special functions.

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